Be prepared that your brain can rebel if you're not used to working from home. Try to make your working environment different from your usual hang-out places to emphasize the differences. Somewhere new, even if just a different chair, will make it easier to promote new habits and not just want to keep putting the TV on. Home is usually your sanctuary from work so you may well find it harder to motivate than expected.
Consider ergonomics. Check that your chair and desk are at a good height, and that you aren’t reaching too far or flexing your wrists at a bad angle on your keyboard. If you can, use an external monitor or raise up your laptop and use an external keyboard. Check out the UC Davis Safety Services Office Ergonomics website.
Keeping set work hours and sticking to them as well as adding these to your email signature can help you to differentiate between work time and home time.
Remember to get up, move, walk around. Consider using your former commute time as exercise time, preferably in fresh air. Working remotely ties you to online work, you will take fewer steps than you would travelling to work, in the office, or dashing across campus for a meeting. Aim to "bookend" your workday with a walk/ride/run to help provide a mental separation between home life and work life.
In times like these, we need practical, actionable ways of coping with stress, fear, and anxiety. The meditations, podcasts, blog posts, and talks on this page will help you build resilience and find some calm amidst the chaos: